by Calum MacLeod, USA TODAY

by Calum MacLeod, USA TODAY

BEIJING â?? Tight security around Beijing's Tiananmen Square Wednesday combined with a months-long crackdown against dissidents and a quarter century of enforced amnesia to prevent public commemoration of the crushing of the 1989 pro-democracy movement.

In Hong Kong, China's semi-democratic enclave, more than 100,000 people attended an evening vigil to mark the bloody end to seven weeks of demonstrations for a fairer, cleaner government 25 years ago.

On the mainland, China's ruling Communist Party forbids citizens from discussing the movement. Thousands were believed to have been killed on the evening of June 3 through June 4, 1989, when the same party sent army troops into central Beijing to quell protesters.

In the past two months, about 50 people have been detained in a pre-anniversary crackdown that Chinese activists and human rights groups have called the most severe ever.

China's state-run media all but ignored the highly sensitive date, while the censor's trigger finger was busy Wednesday blacking out television screens showing CNN and BBC whenever the foreign broadcasters aired segments on Tiananmen.

At a regular briefing Wednesday, Hong said China had reached a conclusion a long time ago about the "political turmoil" in the late 1980s. With familiar phrases, he reiterated the official view that China's chosen path of "socialism with Chinese characteristics" has delivered great economic and social achievements.

At the square, and all roads leading to it, larger than normal numbers of armed police, SWAT teams and plain-clothed security personnel screened and monitored all pedestrians wanting to visit the square, which remained open Wednesday. Some 850,000 security "volunteers," mostly seniors with red armbands, watched over Beijing's roads and alleyways, according to the Legal Evening News.

Most visitors to Tiananmen Square are Chinese tourists from other provinces. Permanent giant screens displayed Party slogans Wednesday and colorful images of a prosperous, strong motherland. The footage highlights the extraordinary economic changes in a country transformed from the drab 1980s into the world's second largest economy.

What hasn't shifted is official silence on the protests, backed by a massive security apparatus and strict control of the Internet. The entire "Beijing Spring" of 1989 is not taught in schools. Most Chinese are unaware of the sensitive date, called "6/4" in Chinese, which sealed in blood the Party's approach to controlling a billion people: allow economic freedoms and punish those seeking political rights.

A quarter century later, several museum visitors appeared blank when asked last week about the movement. Even many eyewitnesses dare not recall those days in public or at home. Beijinger Zhao Jinghai saw both the protests and the military crackdown, but has never told his son, who was just 2 years old at the time.

"The less trouble, the better. How could it help him to know about it?" said Zhao, 56, a taxi driver. "The government forbids discussion of it, so I never discuss it."

Political taboos remain rife in China, where the party bans mention of multiple "sensitive" topics, and its history is a minefield. Even past and current leaders can be off limits. A smiling wax figure of U.S. President Obama stands inside the "Leaders Zone" of Madame Tussauds Beijing, which opened Saturday close to Tiananmen Square, but visitors will not spot a single Chinese ruler.

"Beijing is pretty sensitive, and we're so close to Tiananmen, so we can't display waxworks of Chinese leaders," explained marketing manager Ada Zhao. "Some people might be dissatisfied with the leadership, and attempt some action here."

Even popular first lady Peng Liyuan was vetoed, so they've stopped trying.

"It's just too much trouble," said Zhao.

Almost all Chinese media avoided references to the Tiananmen protests Wednesday. An editorial in the Global Times, a popular and nationalistic tabloid run by The People's Daily, the Party's main mouthpiece, criticized "Western anti-China forces" without directly mentioning the protests. In its English-language edition, targeted at foreign readers, the same editorial claimed that "Chinese society has never forgotten the incident 25 years ago but not talking about it indicates the attitude of society."

The past quarter century "feels like a century," said Wu'er Kaixi, one of the top student leaders who fled abroad after the massacre.

Since 2009, and the 20th anniversary of Tiananmen, Wu'er Kaixi - who works in Taiwain part time as a partner in a U.S. investment banking firm - has tried four times to turn himself in to Chinese embassies, in order to see his family back home in Xinjiang, northwest China. His parents, both members of Uighur ethnic group, are denied Chinese passports, and therefore cannot travel overseas, due to his activism, he said.

"I've been living in exile longer than the time I lived in China, which is very sad and very absurd at the same time," he said. "It's also the same length of time I haven't seen my aging parents, and they haven't seen their son and grandson."